11:30 update
Sign watch continues. The sign should be fully covered by the end of the day today, a spokesperson for the Trust for Public Land told TheWrap.
8 a.m. update:
Something's going down at Griffith Park, or as it's now apparently called, "Sallywood":

Earlier:
The Trust for Public Land's plans to cover up the famed Hollywood sign as part of an ongoing effort to raise $12 million to buy approximately 130 acres of land surrounding the landmark. The group wants to save the area from real estate development.
However, inclement weather and paperwork mishaps have delayed the organization's efforts pushing back plans to cover the sign from Tuesday until Friday.
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Goodbye, Hollywood Sign ... Until Monday (Updated)